Refrigerator.



Patented Jan. 30, I900. H. WIETECK.

REFRIGERATOR.

(Application filud Sept. 6, 1899. v

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(No Model.)

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No. 642,40I. Patented Jan. 30, I900.

H. WIETECK.

REFRIGERATOR.

(Application filed Sepi}. 6, 1899.)

(No Model.)

2 Sheets-Shoat 2.

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ATENT FFICE;

HEINRICH IVIETECIQOF LIEGNITZ, GERMANY.

REFRIGERATOR.

' SPECIFICATION forming part of Letters Patent No. 642,401, dated January 30, 1900.

Application filed September 6, 1899. Serial No. 72 9,638. (No model.)

To aZZ whom it may concern:

Be it known that I, HEINRICH W'IETEOK, a subject of the King of Prussia, Emperor of Germany, residing at Liegnitz, in the Province of Silesia, in the German Empire, have invented new and useful Improvements in Refrigerators, of which the followingis a specification.

The present invention relates to improvements in refrigerators and ice-safes having an ice-box with inclined base.

According to this invention a space is formed resembling an inverted funnel adjacent to the ice-box at that end where it has the least depth. The walls bounding the space are insulated, and at the top there is a vertical passage leading to a horizontal inlet and outlet for conducting the bad air out of the refrigerator and fresh air into it. The air circulation in the refrigerator is by this arrangement given a certain direction.

The invention is illustrated by the accompanying drawings.

Figure 1 shows a longitudinal section of an ice-safe. Fig. 2 is a cross-section of the same. Fig. 3 shows, to an enlarged scale, the righthand corner portion of Fig. 1, indicating in particular the directions takenjby the air-currents in the funnel-shaped space and passages.

Next to the shallower end of ice-box a, having an inclined base I) and contained within an ice-safe with outer and inner walls of any convenient construction, is a space a. This space is of inverted-funnel shape, and the walls surrounding it are insulated. At the apex of the conical or pyramidal part c is a vertical shaft d, the closed upper end of which, 01 lies above the levelof the air inlet and outlet passage 6, which extends horizontally from the passage d to the outside of the ice-safe.

The bad air leaving the apparatus is heavier than the fresh air which enters and will therefore slowly stream out along the bottom of the air-passage e to the outside of the refrigerator. The fresh air, on the other hand, will enter the apparatusby flowing uninterruptedly along the upper portion of the passage e above the current of bad air.

As soon as the fresh air has passed the corner d (see Fig. 3) it will ascend into the upper part d of the vertical shaft d, being lighter than the bad air in the lower part of this shaft. Urged by the pressure of the air entering behind it, the stream of fresh air will pass along in the direction indicated by the arrows in Fig. 3 down to the bottom of the shaft 01 and along the walls of the insulated space 0. The decrease of temperature here ensuing will at first only be to a small extent, so that the air will not immediately descend out of the space a, but will continue to stream along the walls until it reaches the refrigerating-base b of the ice-box a. When the air thus comes in contact with the base 17, its moisture is abstracted and deposited in the form of drops on the base b. This loss of moisture will now render the airlighter, while the fall in temperature will render it heavier. These two effects together will result in the air here also not descending directly vertically from the base 17, but gradually streaming along to the lowest part of the base I). l/Vhen the air thus reaches the lowest part of the inclined base I), it will sink by the side of the inner wall of the safe and, cooled and dried, ultimately reach the bottom of the safe, where the foods stand. The air will now commence to ascend again from the part below the inverted-funnel-shaped space 0, since at this part the temperature in the safe is higher than below the ice-box a. The bad air will therefore uninterruptedly rise into the space 0, be compressed together, ascend the shaft d, and finally escape along the bottom of the air-passage e.

Having thus described my invention, I clain1 A refrigerator, comprising an outer casing, an inner insulating-casing, an ice-box a contained within the latter having an inclined base I), a space cof inverted-funnel shape between the shallower part of said ice-box and said inner casing and insulated on all sides, an upwardlyconducting passage cl leading from said space a and closed above, and a lateral passage 6 leading from the outside of the apparatus to the upper part of the said upwardly-extending passage d, all substantially as and for the purposes hereinbefore set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

HEINRICH WIETEOK.

Witnesses:

RUDOLF FRIESS, WILHELM WEIDNER. 

